Table 5.

previous studies on postnatal anaemia, prevalence, and statistically significant factors

Author/country/year	Study design/sample size	Prevalence of LPNA	Statistically significant factors
Bodnar et al. USA, 2001	Retrospective Cohort Analysis - 59,428 participants between 4 weeks and 26 weeks postpartum	27% (Anaemia = Hb < 12.0 g/dl for women at least age 15 years)	Prenatal anaemia; maternal obesity; multiple birth; and not breastfeeding
Louise Sserunjogi et al. Uganda, 2003	Cross-sectional study -349 mothers between 6 weeks and 12 months	64.4% (Anaemia = Hb <12g/dl)	Iron supplementation; excessive bleeding during or after delivery
Trinh and Dibley, 2007, Vietnam	Cross-sectional survey -348 women between 0 and to 6months postpartum	62% (Anaemia = Hb < 12g/dl)	Women aged 30 years or older
Somdatta et al. North India, 2009	Prospective community-based study -168 women at 6 weeks postpartum	70% (Anaemia = Hb<11g/dl)	Consumption of 90 IFA tablets
Rakesh et al. Southern India, 2011	Prospective Cohort study; 93 women at 36th to 38th week of pregnancy and the 2nd and 6th week postpartum.	47.3% (Anaemia = Hb<12g/dl)	Anaemia in the third trimester of pregnancy; heavy bleeding was perceived by the mother during delivery; younger maternal age; inadequate iron supplementation during the postpartum period
Bhagwan et al. India 2014	Community-based cross-sectional study; 401 women between 6 to 14 weeks postpartum.	26.5% (Anaemia = Hb<12gm/dl)	Illiteracy
Deepthi et al. Southern India, 2015	Cross-sectional Study. - 647 women between 0 to 23 months postpartum	65.8% (Anaemia = Hb<12g/dl)	Educational status of the woman; consumption of iron tablets during pregnancy.
Emegoakor et al. 2015, Nigeria	Prospective longitudinal study; 202 women with uncomplicated singleton pregnancies from term to 6 weeks postpartum	47.5% (Anaemia = Hb< 11g/dl)	Employment status; anaemia at term; anaemia at 48 h postpartum; low ferritin concentration at 48 h postpartum.